From 4e571aba7bb25a3a069a7b88c0f63fe5a14c05c6 Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Thu, 1 May 2008 12:28:04 +0100 Subject: [JFFS2] Clean up jffs2_alloc_inode() and jffs2_i_init_once() Ditch a couple of pointless casts from void *, and use the normal variable name 'f' for jffs2_inode_info pointers -- especially since it actually shows up in lockdep reports. Signed-off-by: David Woodhouse --- fs/jffs2/super.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) (limited to 'fs') diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c index f3353df178e7..7da69eae49e4 100644 --- a/fs/jffs2/super.c +++ b/fs/jffs2/super.c @@ -31,11 +31,12 @@ static struct kmem_cache *jffs2_inode_cachep; static struct inode *jffs2_alloc_inode(struct super_block *sb) { - struct jffs2_inode_info *ei; - ei = (struct jffs2_inode_info *)kmem_cache_alloc(jffs2_inode_cachep, GFP_KERNEL); - if (!ei) + struct jffs2_inode_info *f; + + f = kmem_cache_alloc(jffs2_inode_cachep, GFP_KERNEL); + if (!f) return NULL; - return &ei->vfs_inode; + return &f->vfs_inode; } static void jffs2_destroy_inode(struct inode *inode) @@ -45,10 +46,10 @@ static void jffs2_destroy_inode(struct inode *inode) static void jffs2_i_init_once(struct kmem_cache *cachep, void *foo) { - struct jffs2_inode_info *ei = (struct jffs2_inode_info *) foo; + struct jffs2_inode_info *f = foo; - mutex_init(&ei->sem); - inode_init_once(&ei->vfs_inode); + mutex_init(&f->sem); + inode_init_once(&f->vfs_inode); } static int jffs2_sync_fs(struct super_block *sb, int wait) -- cgit v1.2.3 From 590fe34c47cb5c2d836ac76fabc5f160bf31a3f1 Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Thu, 1 May 2008 15:53:28 +0100 Subject: [JFFS2] Quiet lockdep false positive. Don't hold f->sem while calling into jffs2_do_create(). It makes lockdep unhappy, and we don't really need it -- the _reason_ it's a false positive is because nobody else can see this inode yet and so nobody will be trying to lock it anyway. Signed-off-by: David Woodhouse --- fs/jffs2/dir.c | 7 +++++++ fs/jffs2/write.c | 6 +++--- 2 files changed, 10 insertions(+), 3 deletions(-) (limited to 'fs') diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c index c63e7a96af0d..2bba3d3435be 100644 --- a/fs/jffs2/dir.c +++ b/fs/jffs2/dir.c @@ -208,6 +208,13 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode, f = JFFS2_INODE_INFO(inode); dir_f = JFFS2_INODE_INFO(dir_i); + /* jffs2_do_create() will want to lock it, _after_ reserving + space and taking c-alloc_sem. If we keep it locked here, + lockdep gets unhappy (although it's a false positive; + nothing else will be looking at this inode yet so there's + no chance of AB-BA deadlock involving its f->sem). */ + mutex_unlock(&f->sem); + ret = jffs2_do_create(c, dir_f, f, ri, dentry->d_name.name, dentry->d_name.len); if (ret) diff --git a/fs/jffs2/write.c b/fs/jffs2/write.c index 665fce9797d3..87891bdd7915 100644 --- a/fs/jffs2/write.c +++ b/fs/jffs2/write.c @@ -438,10 +438,10 @@ int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, str ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); D1(printk(KERN_DEBUG "jffs2_do_create(): reserved 0x%x bytes\n", alloclen)); - if (ret) { - mutex_unlock(&f->sem); + if (ret) return ret; - } + + mutex_lock(&f->sem); ri->data_crc = cpu_to_je32(0); ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); -- cgit v1.2.3 From 1b690b48786229571e590dd22fe01ecc22a8746b Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Thu, 1 May 2008 16:59:24 +0100 Subject: [JFFS2] Invert last argument of jffs2_gc_fetch_inode(), make it boolean. We don't actually care about nlink; we only care whether the inode in question is unlinked or not. Signed-off-by: David Woodhouse --- fs/jffs2/fs.c | 9 +++++---- fs/jffs2/gc.c | 2 +- fs/jffs2/os-linux.h | 2 +- fs/jffs2/wbuf.c | 2 +- 4 files changed, 8 insertions(+), 7 deletions(-) (limited to 'fs') diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c index 3eb1c84b0a33..e14b185a80df 100644 --- a/fs/jffs2/fs.c +++ b/fs/jffs2/fs.c @@ -586,11 +586,12 @@ void jffs2_gc_release_inode(struct jffs2_sb_info *c, } struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, - int inum, int nlink) + int inum, int unlinked) { struct inode *inode; struct jffs2_inode_cache *ic; - if (!nlink) { + + if (unlinked) { /* The inode has zero nlink but its nodes weren't yet marked obsolete. This has to be because we're still waiting for the final (close() and) iput() to happen. @@ -638,8 +639,8 @@ struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, return ERR_CAST(inode); } if (is_bad_inode(inode)) { - printk(KERN_NOTICE "Eep. read_inode() failed for ino #%u. nlink %d\n", - inum, nlink); + printk(KERN_NOTICE "Eep. read_inode() failed for ino #%u. unlinked %d\n", + inum, unlinked); /* NB. This will happen again. We need to do something appropriate here. */ iput(inode); return ERR_PTR(-EIO); diff --git a/fs/jffs2/gc.c b/fs/jffs2/gc.c index bad005664e30..d4db0efeceaf 100644 --- a/fs/jffs2/gc.c +++ b/fs/jffs2/gc.c @@ -401,7 +401,7 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c) nlink = ic->nlink; spin_unlock(&c->inocache_lock); - f = jffs2_gc_fetch_inode(c, inum, nlink); + f = jffs2_gc_fetch_inode(c, inum, !nlink); if (IS_ERR(f)) { ret = PTR_ERR(f); goto release_sem; diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h index 1b10d2594092..2cc866cf134f 100644 --- a/fs/jffs2/os-linux.h +++ b/fs/jffs2/os-linux.h @@ -187,7 +187,7 @@ int jffs2_do_fill_super(struct super_block *sb, void *data, int silent); void jffs2_gc_release_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f); struct jffs2_inode_info *jffs2_gc_fetch_inode(struct jffs2_sb_info *c, - int inum, int nlink); + int inum, int unlinked); unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c, struct jffs2_inode_info *f, diff --git a/fs/jffs2/wbuf.c b/fs/jffs2/wbuf.c index 8de52b607678..92ab32a987ba 100644 --- a/fs/jffs2/wbuf.c +++ b/fs/jffs2/wbuf.c @@ -494,7 +494,7 @@ static void jffs2_wbuf_recover(struct jffs2_sb_info *c) /* If it's an in-core inode, then we have to adjust any full_dirent or full_dnode structure to point to the new version instead of the old */ - f = jffs2_gc_fetch_inode(c, ic->ino, ic->nlink); + f = jffs2_gc_fetch_inode(c, ic->ino, !ic->nlink); if (IS_ERR(f)) { /* Should never happen; it _must_ be present */ JFFS2_ERROR("Failed to iget() ino #%u, err %ld\n", -- cgit v1.2.3 From 27c72b040c0be8f3704ed0b6b84c12cbba24a7e8 Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Thu, 1 May 2008 18:47:17 +0100 Subject: [JFFS2] Track parent inode for directories (for NFS export) To support NFS export, we need to know the parent inode of directories. Rather than growing the jffs2_inode_cache structure, share space with the nlink field -- which was always set to 1 for directories anyway. Signed-off-by: David Woodhouse --- fs/jffs2/build.c | 31 ++++++++++++++++++++----------- fs/jffs2/dir.c | 35 +++++++++++++++++++++++++---------- fs/jffs2/erase.c | 2 +- fs/jffs2/fs.c | 5 ++--- fs/jffs2/gc.c | 6 +++--- fs/jffs2/nodelist.h | 5 ++++- fs/jffs2/nodemgmt.c | 2 +- fs/jffs2/readinode.c | 7 ++++--- fs/jffs2/scan.c | 2 +- fs/jffs2/wbuf.c | 2 +- fs/jffs2/write.c | 11 ++++++----- fs/jffs2/xattr.c | 4 ++-- 12 files changed, 70 insertions(+), 42 deletions(-) (limited to 'fs') diff --git a/fs/jffs2/build.c b/fs/jffs2/build.c index d58f845ccb85..c5e1450d79f9 100644 --- a/fs/jffs2/build.c +++ b/fs/jffs2/build.c @@ -46,7 +46,7 @@ next_inode(int *i, struct jffs2_inode_cache *ic, struct jffs2_sb_info *c) static void jffs2_build_inode_pass1(struct jffs2_sb_info *c, - struct jffs2_inode_cache *ic) + struct jffs2_inode_cache *ic) { struct jffs2_full_dirent *fd; @@ -68,11 +68,17 @@ static void jffs2_build_inode_pass1(struct jffs2_sb_info *c, continue; } - if (child_ic->nlink++ && fd->type == DT_DIR) { - JFFS2_ERROR("child dir \"%s\" (ino #%u) of dir ino #%u appears to be a hard link\n", - fd->name, fd->ino, ic->ino); - /* TODO: What do we do about it? */ - } + if (fd->type == DT_DIR) { + if (child_ic->pino_nlink) { + JFFS2_ERROR("child dir \"%s\" (ino #%u) of dir ino #%u appears to be a hard link\n", + fd->name, fd->ino, ic->ino); + /* TODO: What do we do about it? */ + } else { + child_ic->pino_nlink = ic->ino; + } + } else + child_ic->pino_nlink++; + dbg_fsbuild("increased nlink for child \"%s\" (ino #%u)\n", fd->name, fd->ino); /* Can't free scan_dents so far. We might need them in pass 2 */ } @@ -125,7 +131,7 @@ static int jffs2_build_filesystem(struct jffs2_sb_info *c) dbg_fsbuild("pass 2 starting\n"); for_each_inode(i, c, ic) { - if (ic->nlink) + if (ic->pino_nlink) continue; jffs2_build_remove_unlinked_inode(c, ic, &dead_fds); @@ -232,16 +238,19 @@ static void jffs2_build_remove_unlinked_inode(struct jffs2_sb_info *c, /* Reduce nlink of the child. If it's now zero, stick it on the dead_fds list to be cleaned up later. Else just free the fd */ - child_ic->nlink--; + if (fd->type == DT_DIR) + child_ic->pino_nlink = 0; + else + child_ic->pino_nlink--; - if (!child_ic->nlink) { - dbg_fsbuild("inode #%u (\"%s\") has now got zero nlink, adding to dead_fds list.\n", + if (!child_ic->pino_nlink) { + dbg_fsbuild("inode #%u (\"%s\") now has no links; adding to dead_fds list.\n", fd->ino, fd->name); fd->next = *dead_fds; *dead_fds = fd; } else { dbg_fsbuild("inode #%u (\"%s\") has now got nlink %d. Ignoring.\n", - fd->ino, fd->name, child_ic->nlink); + fd->ino, fd->name, child_ic->pino_nlink); jffs2_free_full_dirent(fd); } } diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c index 2bba3d3435be..c0c141f6fde1 100644 --- a/fs/jffs2/dir.c +++ b/fs/jffs2/dir.c @@ -226,7 +226,8 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode, d_instantiate(dentry, inode); D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld\n", - inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink, inode->i_mapping->nrpages)); + inode->i_ino, inode->i_mode, inode->i_nlink, + f->inocache->pino_nlink, inode->i_mapping->nrpages)); return 0; fail: @@ -250,7 +251,7 @@ static int jffs2_unlink(struct inode *dir_i, struct dentry *dentry) ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name, dentry->d_name.len, dead_f, now); if (dead_f->inocache) - dentry->d_inode->i_nlink = dead_f->inocache->nlink; + dentry->d_inode->i_nlink = dead_f->inocache->pino_nlink; if (!ret) dir_i->i_mtime = dir_i->i_ctime = ITIME(now); return ret; @@ -283,7 +284,7 @@ static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct de if (!ret) { mutex_lock(&f->sem); - old_dentry->d_inode->i_nlink = ++f->inocache->nlink; + old_dentry->d_inode->i_nlink = ++f->inocache->pino_nlink; mutex_unlock(&f->sem); d_instantiate(dentry, old_dentry->d_inode); dir_i->i_mtime = dir_i->i_ctime = ITIME(now); @@ -500,11 +501,14 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode) inode->i_op = &jffs2_dir_inode_operations; inode->i_fop = &jffs2_dir_operations; - /* Directories get nlink 2 at start */ - inode->i_nlink = 2; f = JFFS2_INODE_INFO(inode); + /* Directories get nlink 2 at start */ + inode->i_nlink = 2; + /* but ic->pino_nlink is the parent ino# */ + f->inocache->pino_nlink = dir_i->i_ino; + ri->data_crc = cpu_to_je32(0); ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); @@ -601,17 +605,25 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode) static int jffs2_rmdir (struct inode *dir_i, struct dentry *dentry) { + struct jffs2_sb_info *c = JFFS2_SB_INFO(dir_i->i_sb); + struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i); struct jffs2_inode_info *f = JFFS2_INODE_INFO(dentry->d_inode); struct jffs2_full_dirent *fd; int ret; + uint32_t now = get_seconds(); for (fd = f->dents ; fd; fd = fd->next) { if (fd->ino) return -ENOTEMPTY; } - ret = jffs2_unlink(dir_i, dentry); - if (!ret) + + ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name, + dentry->d_name.len, f, now); + if (!ret) { + dir_i->i_mtime = dir_i->i_ctime = ITIME(now); + clear_nlink(dentry->d_inode); drop_nlink(dir_i); + } return ret; } @@ -824,7 +836,10 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry, inode which didn't exist. */ if (victim_f->inocache) { mutex_lock(&victim_f->sem); - victim_f->inocache->nlink--; + if (S_ISDIR(new_dentry->d_inode->i_mode)) + victim_f->inocache->pino_nlink = 0; + else + victim_f->inocache->pino_nlink--; mutex_unlock(&victim_f->sem); } } @@ -845,8 +860,8 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry, struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode); mutex_lock(&f->sem); inc_nlink(old_dentry->d_inode); - if (f->inocache) - f->inocache->nlink++; + if (f->inocache && !S_ISDIR(old_dentry->d_inode->i_mode)) + f->inocache->pino_nlink++; mutex_unlock(&f->sem); printk(KERN_NOTICE "jffs2_rename(): Link succeeded, unlink failed (err %d). You now have a hard link\n", ret); diff --git a/fs/jffs2/erase.c b/fs/jffs2/erase.c index 25a640e566d3..5e86f43616a1 100644 --- a/fs/jffs2/erase.c +++ b/fs/jffs2/erase.c @@ -294,7 +294,7 @@ static inline void jffs2_remove_node_refs_from_ino_list(struct jffs2_sb_info *c, break; #endif default: - if (ic->nodes == (void *)ic && ic->nlink == 0) + if (ic->nodes == (void *)ic && ic->pino_nlink == 0) jffs2_del_ino_cache(c, ic); } } diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c index e14b185a80df..086c43830221 100644 --- a/fs/jffs2/fs.c +++ b/fs/jffs2/fs.c @@ -273,7 +273,7 @@ struct inode *jffs2_iget(struct super_block *sb, unsigned long ino) inode->i_mtime = ITIME(je32_to_cpu(latest_node.mtime)); inode->i_ctime = ITIME(je32_to_cpu(latest_node.ctime)); - inode->i_nlink = f->inocache->nlink; + inode->i_nlink = f->inocache->pino_nlink; inode->i_blocks = (inode->i_size + 511) >> 9; @@ -286,13 +286,12 @@ struct inode *jffs2_iget(struct super_block *sb, unsigned long ino) case S_IFDIR: { struct jffs2_full_dirent *fd; + inode->i_nlink = 2; /* parent and '.' */ for (fd=f->dents; fd; fd = fd->next) { if (fd->type == DT_DIR && fd->ino) inc_nlink(inode); } - /* and '..' */ - inc_nlink(inode); /* Root dir gets i_nlink 3 for some reason */ if (inode->i_ino == 1) inc_nlink(inode); diff --git a/fs/jffs2/gc.c b/fs/jffs2/gc.c index d4db0efeceaf..090c556ffed2 100644 --- a/fs/jffs2/gc.c +++ b/fs/jffs2/gc.c @@ -161,8 +161,8 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c) continue; } - if (!ic->nlink) { - D1(printk(KERN_DEBUG "Skipping check of ino #%d with nlink zero\n", + if (!ic->pino_nlink) { + D1(printk(KERN_DEBUG "Skipping check of ino #%d with nlink/pino zero\n", ic->ino)); spin_unlock(&c->inocache_lock); jffs2_xattr_delete_inode(c, ic); @@ -398,7 +398,7 @@ int jffs2_garbage_collect_pass(struct jffs2_sb_info *c) it's vaguely possible. */ inum = ic->ino; - nlink = ic->nlink; + nlink = ic->pino_nlink; spin_unlock(&c->inocache_lock); f = jffs2_gc_fetch_inode(c, inum, !nlink); diff --git a/fs/jffs2/nodelist.h b/fs/jffs2/nodelist.h index 8219df6eb6d8..1750445556c3 100644 --- a/fs/jffs2/nodelist.h +++ b/fs/jffs2/nodelist.h @@ -177,7 +177,10 @@ struct jffs2_inode_cache { #ifdef CONFIG_JFFS2_FS_XATTR struct jffs2_xattr_ref *xref; #endif - int nlink; + uint32_t pino_nlink; /* Directories store parent inode + here; other inodes store nlink. + Zero always means that it's + completely unlinked. */ }; /* Inode states for 'state' above. We need the 'GC' state to prevent diff --git a/fs/jffs2/nodemgmt.c b/fs/jffs2/nodemgmt.c index 9df8f3ef20df..a9bf9603c1ba 100644 --- a/fs/jffs2/nodemgmt.c +++ b/fs/jffs2/nodemgmt.c @@ -709,7 +709,7 @@ void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref break; #endif default: - if (ic->nodes == (void *)ic && ic->nlink == 0) + if (ic->nodes == (void *)ic && ic->pino_nlink == 0) jffs2_del_ino_cache(c, ic); break; } diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c index 4cb4d76de07f..9fc4833c117c 100644 --- a/fs/jffs2/readinode.c +++ b/fs/jffs2/readinode.c @@ -1123,7 +1123,8 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c, size_t retlen; int ret; - dbg_readinode("ino #%u nlink is %d\n", f->inocache->ino, f->inocache->nlink); + dbg_readinode("ino #%u pino/nlink is %d\n", f->inocache->ino, + f->inocache->pino_nlink); memset(&rii, 0, sizeof(rii)); @@ -1358,7 +1359,7 @@ int jffs2_do_read_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, } dbg_readinode("creating inocache for root inode\n"); memset(f->inocache, 0, sizeof(struct jffs2_inode_cache)); - f->inocache->ino = f->inocache->nlink = 1; + f->inocache->ino = f->inocache->pino_nlink = 1; f->inocache->nodes = (struct jffs2_raw_node_ref *)f->inocache; f->inocache->state = INO_STATE_READING; jffs2_add_ino_cache(c, f->inocache); @@ -1401,7 +1402,7 @@ void jffs2_do_clear_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f) jffs2_clear_acl(f); jffs2_xattr_delete_inode(c, f->inocache); mutex_lock(&f->sem); - deleted = f->inocache && !f->inocache->nlink; + deleted = f->inocache && !f->inocache->pino_nlink; if (f->inocache && f->inocache->state != INO_STATE_CHECKING) jffs2_set_inocache_state(c, f->inocache, INO_STATE_CLEARING); diff --git a/fs/jffs2/scan.c b/fs/jffs2/scan.c index 272872d27fd5..8c1e692bef79 100644 --- a/fs/jffs2/scan.c +++ b/fs/jffs2/scan.c @@ -940,7 +940,7 @@ struct jffs2_inode_cache *jffs2_scan_make_ino_cache(struct jffs2_sb_info *c, uin ic->nodes = (void *)ic; jffs2_add_ino_cache(c, ic); if (ino == 1) - ic->nlink = 1; + ic->pino_nlink = 1; return ic; } diff --git a/fs/jffs2/wbuf.c b/fs/jffs2/wbuf.c index 92ab32a987ba..0e78b00035e4 100644 --- a/fs/jffs2/wbuf.c +++ b/fs/jffs2/wbuf.c @@ -494,7 +494,7 @@ static void jffs2_wbuf_recover(struct jffs2_sb_info *c) /* If it's an in-core inode, then we have to adjust any full_dirent or full_dnode structure to point to the new version instead of the old */ - f = jffs2_gc_fetch_inode(c, ic->ino, !ic->nlink); + f = jffs2_gc_fetch_inode(c, ic->ino, !ic->pino_nlink); if (IS_ERR(f)) { /* Should never happen; it _must_ be present */ JFFS2_ERROR("Failed to iget() ino #%u, err %ld\n", diff --git a/fs/jffs2/write.c b/fs/jffs2/write.c index 87891bdd7915..ca29440e9435 100644 --- a/fs/jffs2/write.c +++ b/fs/jffs2/write.c @@ -19,7 +19,8 @@ #include "compr.h" -int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint32_t mode, struct jffs2_raw_inode *ri) +int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, + uint32_t mode, struct jffs2_raw_inode *ri) { struct jffs2_inode_cache *ic; @@ -31,7 +32,7 @@ int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint memset(ic, 0, sizeof(*ic)); f->inocache = ic; - f->inocache->nlink = 1; + f->inocache->pino_nlink = 1; /* Will be overwritten shortly for directories */ f->inocache->nodes = (struct jffs2_raw_node_ref *)f->inocache; f->inocache->state = INO_STATE_PRESENT; @@ -635,9 +636,9 @@ int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, jffs2_mark_node_obsolete(c, fd->raw); jffs2_free_full_dirent(fd); } - } - - dead_f->inocache->nlink--; + dead_f->inocache->pino_nlink = 0; + } else + dead_f->inocache->pino_nlink--; /* NB: Caller must set inode nlink if appropriate */ mutex_unlock(&dead_f->sem); } diff --git a/fs/jffs2/xattr.c b/fs/jffs2/xattr.c index e48665984cb3..05531f291bfa 100644 --- a/fs/jffs2/xattr.c +++ b/fs/jffs2/xattr.c @@ -592,7 +592,7 @@ void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache When an inode with XATTR is removed, those XATTRs must be removed. */ struct jffs2_xattr_ref *ref, *_ref; - if (!ic || ic->nlink > 0) + if (!ic || ic->pino_nlink > 0) return; down_write(&c->xattr_sem); @@ -829,7 +829,7 @@ void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c) ref->xd and ref->ic are not valid yet. */ xd = jffs2_find_xattr_datum(c, ref->xid); ic = jffs2_get_ino_cache(c, ref->ino); - if (!xd || !ic || !ic->nlink) { + if (!xd || !ic || !ic->pino_nlink) { dbg_xattr("xref(ino=%u, xid=%u, xseqno=%u) is orphan.\n", ref->ino, ref->xid, ref->xseqno); ref->xseqno |= XREF_DELETE_MARKER; -- cgit v1.2.3 From a98889f3d8882995b5aa2255b931cf0202325cc0 Mon Sep 17 00:00:00 2001 From: Jared Hulbert Date: Tue, 29 Apr 2008 23:26:49 -0700 Subject: [MTD][NOR] Add physical address to point() method MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Adding the ability to get a physical address from point() in addition to virtual address. This physical address is required for XIP of userspace code from flash. Signed-off-by: Jared Hulbert Reviewed-by: Jörn Engel Acked-by: Nicolas Pitre Acked-by: Greg Ungerer Signed-off-by: David Woodhouse --- drivers/mtd/chips/cfi_cmdset_0001.c | 14 ++++++++------ drivers/mtd/devices/mtdram.c | 11 +++++++---- drivers/mtd/devices/phram.c | 13 +++++++------ drivers/mtd/devices/pmc551.c | 27 +++++++++++++++++---------- drivers/mtd/devices/slram.c | 15 ++++++++++----- drivers/mtd/maps/uclinux.c | 6 ++++-- drivers/mtd/mtdpart.c | 8 ++++---- fs/jffs2/erase.c | 7 ++++--- fs/jffs2/readinode.c | 9 +++++---- fs/jffs2/scan.c | 7 ++++--- include/linux/mtd/mtd.h | 6 ++++-- include/linux/mtd/pmc551.h | 5 +++-- 12 files changed, 77 insertions(+), 51 deletions(-) (limited to 'fs') diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c index e812df607a5c..fcd1aeccdf93 100644 --- a/drivers/mtd/chips/cfi_cmdset_0001.c +++ b/drivers/mtd/chips/cfi_cmdset_0001.c @@ -82,9 +82,8 @@ static struct mtd_info *cfi_intelext_setup (struct mtd_info *); static int cfi_intelext_partition_fixup(struct mtd_info *, struct cfi_private **); static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, u_char **mtdbuf); -static void cfi_intelext_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, - size_t len); + size_t *retlen, void **virt, resource_size_t *phys); +static void cfi_intelext_unpoint(struct mtd_info *mtd, loff_t from, size_t len); static int chip_ready (struct map_info *map, struct flchip *chip, unsigned long adr, int mode); static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode); @@ -1240,7 +1239,8 @@ static int do_point_onechip (struct map_info *map, struct flchip *chip, loff_t a return ret; } -static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf) +static int cfi_intelext_point(struct mtd_info *mtd, loff_t from, size_t len, + size_t *retlen, void **virt, resource_size_t *phys) { struct map_info *map = mtd->priv; struct cfi_private *cfi = map->fldrv_priv; @@ -1257,8 +1257,10 @@ static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, si chipnum = (from >> cfi->chipshift); ofs = from - (chipnum << cfi->chipshift); - *mtdbuf = (void *)map->virt + cfi->chips[chipnum].start + ofs; + *virt = map->virt + cfi->chips[chipnum].start + ofs; *retlen = 0; + if (phys) + *phys = map->phys + cfi->chips[chipnum].start + ofs; while (len) { unsigned long thislen; @@ -1291,7 +1293,7 @@ static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, si return 0; } -static void cfi_intelext_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, size_t len) +static void cfi_intelext_unpoint(struct mtd_info *mtd, loff_t from, size_t len) { struct map_info *map = mtd->priv; struct cfi_private *cfi = map->fldrv_priv; diff --git a/drivers/mtd/devices/mtdram.c b/drivers/mtd/devices/mtdram.c index bf485ff49457..0399be178620 100644 --- a/drivers/mtd/devices/mtdram.c +++ b/drivers/mtd/devices/mtdram.c @@ -48,18 +48,21 @@ static int ram_erase(struct mtd_info *mtd, struct erase_info *instr) } static int ram_point(struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, u_char **mtdbuf) + size_t *retlen, void **virt, resource_size_t *phys) { if (from + len > mtd->size) return -EINVAL; - *mtdbuf = mtd->priv + from; + /* can we return a physical address with this driver? */ + if (phys) + return -EINVAL; + + *virt = mtd->priv + from; *retlen = len; return 0; } -static void ram_unpoint(struct mtd_info *mtd, u_char * addr, loff_t from, - size_t len) +static void ram_unpoint(struct mtd_info *mtd, loff_t from, size_t len) { } diff --git a/drivers/mtd/devices/phram.c b/drivers/mtd/devices/phram.c index 5f960182da95..c7987b1c5e01 100644 --- a/drivers/mtd/devices/phram.c +++ b/drivers/mtd/devices/phram.c @@ -57,20 +57,21 @@ static int phram_erase(struct mtd_info *mtd, struct erase_info *instr) } static int phram_point(struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, u_char **mtdbuf) + size_t *retlen, void **virt, resource_size_t *phys) { - u_char *start = mtd->priv; - if (from + len > mtd->size) return -EINVAL; - *mtdbuf = start + from; + /* can we return a physical address with this driver? */ + if (phys) + return -EINVAL; + + *virt = mtd->priv + from; *retlen = len; return 0; } -static void phram_unpoint(struct mtd_info *mtd, u_char *addr, loff_t from, - size_t len) +static void phram_unpoint(struct mtd_info *mtd, loff_t from, size_t len) { } diff --git a/drivers/mtd/devices/pmc551.c b/drivers/mtd/devices/pmc551.c index 7060a0895ce2..bc9981749064 100644 --- a/drivers/mtd/devices/pmc551.c +++ b/drivers/mtd/devices/pmc551.c @@ -134,7 +134,8 @@ static int pmc551_erase(struct mtd_info *mtd, struct erase_info *instr) eoff_lo = end & (priv->asize - 1); soff_lo = instr->addr & (priv->asize - 1); - pmc551_point(mtd, instr->addr, instr->len, &retlen, &ptr); + pmc551_point(mtd, instr->addr, instr->len, &retlen, + (void **)&ptr, NULL); if (soff_hi == eoff_hi || mtd->size == priv->asize) { /* The whole thing fits within one access, so just one shot @@ -154,7 +155,8 @@ static int pmc551_erase(struct mtd_info *mtd, struct erase_info *instr) } soff_hi += priv->asize; pmc551_point(mtd, (priv->base_map0 | soff_hi), - priv->asize, &retlen, &ptr); + priv->asize, &retlen, + (void **)&ptr, NULL); } memset(ptr, 0xff, eoff_lo); } @@ -170,7 +172,7 @@ static int pmc551_erase(struct mtd_info *mtd, struct erase_info *instr) } static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len, - size_t * retlen, u_char ** mtdbuf) + size_t *retlen, void **virt, resource_size_t *phys) { struct mypriv *priv = mtd->priv; u32 soff_hi; @@ -188,6 +190,10 @@ static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len, return -EINVAL; } + /* can we return a physical address with this driver? */ + if (phys) + return -EINVAL; + soff_hi = from & ~(priv->asize - 1); soff_lo = from & (priv->asize - 1); @@ -198,13 +204,12 @@ static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len, priv->curr_map0 = soff_hi; } - *mtdbuf = priv->start + soff_lo; + *virt = priv->start + soff_lo; *retlen = len; return 0; } -static void pmc551_unpoint(struct mtd_info *mtd, u_char * addr, loff_t from, - size_t len) +static void pmc551_unpoint(struct mtd_info *mtd, loff_t from, size_t len) { #ifdef CONFIG_MTD_PMC551_DEBUG printk(KERN_DEBUG "pmc551_unpoint()\n"); @@ -242,7 +247,7 @@ static int pmc551_read(struct mtd_info *mtd, loff_t from, size_t len, soff_lo = from & (priv->asize - 1); eoff_lo = end & (priv->asize - 1); - pmc551_point(mtd, from, len, retlen, &ptr); + pmc551_point(mtd, from, len, retlen, (void **)&ptr, NULL); if (soff_hi == eoff_hi) { /* The whole thing fits within one access, so just one shot @@ -263,7 +268,8 @@ static int pmc551_read(struct mtd_info *mtd, loff_t from, size_t len, goto out; } soff_hi += priv->asize; - pmc551_point(mtd, soff_hi, priv->asize, retlen, &ptr); + pmc551_point(mtd, soff_hi, priv->asize, retlen, + (void **)&ptr, NULL); } memcpy(copyto, ptr, eoff_lo); copyto += eoff_lo; @@ -308,7 +314,7 @@ static int pmc551_write(struct mtd_info *mtd, loff_t to, size_t len, soff_lo = to & (priv->asize - 1); eoff_lo = end & (priv->asize - 1); - pmc551_point(mtd, to, len, retlen, &ptr); + pmc551_point(mtd, to, len, retlen, (void **)&ptr, NULL); if (soff_hi == eoff_hi) { /* The whole thing fits within one access, so just one shot @@ -329,7 +335,8 @@ static int pmc551_write(struct mtd_info *mtd, loff_t to, size_t len, goto out; } soff_hi += priv->asize; - pmc551_point(mtd, soff_hi, priv->asize, retlen, &ptr); + pmc551_point(mtd, soff_hi, priv->asize, retlen, + (void **)&ptr, NULL); } memcpy(ptr, copyfrom, eoff_lo); copyfrom += eoff_lo; diff --git a/drivers/mtd/devices/slram.c b/drivers/mtd/devices/slram.c index d293add1857c..cb86db746f28 100644 --- a/drivers/mtd/devices/slram.c +++ b/drivers/mtd/devices/slram.c @@ -76,8 +76,9 @@ static char *map; static slram_mtd_list_t *slram_mtdlist = NULL; static int slram_erase(struct mtd_info *, struct erase_info *); -static int slram_point(struct mtd_info *, loff_t, size_t, size_t *, u_char **); -static void slram_unpoint(struct mtd_info *, u_char *, loff_t, size_t); +static int slram_point(struct mtd_info *, loff_t, size_t, size_t *, void **, + resource_size_t *); +static void slram_unpoint(struct mtd_info *, loff_t, size_t); static int slram_read(struct mtd_info *, loff_t, size_t, size_t *, u_char *); static int slram_write(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); @@ -104,19 +105,23 @@ static int slram_erase(struct mtd_info *mtd, struct erase_info *instr) } static int slram_point(struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, u_char **mtdbuf) + size_t *retlen, void **virt, resource_size_t *phys) { slram_priv_t *priv = mtd->priv; + /* can we return a physical address with this driver? */ + if (phys) + return -EINVAL; + if (from + len > mtd->size) return -EINVAL; - *mtdbuf = priv->start + from; + *virt = priv->start + from; *retlen = len; return(0); } -static void slram_unpoint(struct mtd_info *mtd, u_char *addr, loff_t from, size_t len) +static void slram_unpoint(struct mtd_info *mtd, loff_t from, size_t len) { } diff --git a/drivers/mtd/maps/uclinux.c b/drivers/mtd/maps/uclinux.c index 14ffb1a9302a..c42f4b83f686 100644 --- a/drivers/mtd/maps/uclinux.c +++ b/drivers/mtd/maps/uclinux.c @@ -40,10 +40,12 @@ struct mtd_partition uclinux_romfs[] = { /****************************************************************************/ int uclinux_point(struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, u_char **mtdbuf) + size_t *retlen, void **virt, resource_size_t *phys) { struct map_info *map = mtd->priv; - *mtdbuf = (u_char *) (map->virt + ((int) from)); + *virt = map->virt + from; + if (phys) + *phys = map->phys + from; *retlen = len; return(0); } diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c index c66902df3171..07c701169344 100644 --- a/drivers/mtd/mtdpart.c +++ b/drivers/mtd/mtdpart.c @@ -68,7 +68,7 @@ static int part_read (struct mtd_info *mtd, loff_t from, size_t len, } static int part_point (struct mtd_info *mtd, loff_t from, size_t len, - size_t *retlen, u_char **buf) + size_t *retlen, void **virt, resource_size_t *phys) { struct mtd_part *part = PART(mtd); if (from >= mtd->size) @@ -76,14 +76,14 @@ static int part_point (struct mtd_info *mtd, loff_t from, size_t len, else if (from + len > mtd->size) len = mtd->size - from; return part->master->point (part->master, from + part->offset, - len, retlen, buf); + len, retlen, virt, phys); } -static void part_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, size_t len) +static void part_unpoint(struct mtd_info *mtd, loff_t from, size_t len) { struct mtd_part *part = PART(mtd); - part->master->unpoint (part->master, addr, from + part->offset, len); + part->master->unpoint(part->master, from + part->offset, len); } static int part_read_oob(struct mtd_info *mtd, loff_t from, diff --git a/fs/jffs2/erase.c b/fs/jffs2/erase.c index 5e86f43616a1..dddb2a6c9e2c 100644 --- a/fs/jffs2/erase.c +++ b/fs/jffs2/erase.c @@ -332,7 +332,8 @@ static int jffs2_block_check_erase(struct jffs2_sb_info *c, struct jffs2_erasebl if (c->mtd->point) { unsigned long *wordebuf; - ret = c->mtd->point(c->mtd, jeb->offset, c->sector_size, &retlen, (unsigned char **)&ebuf); + ret = c->mtd->point(c->mtd, jeb->offset, c->sector_size, + &retlen, &ebuf, NULL); if (ret) { D1(printk(KERN_DEBUG "MTD point failed %d\n", ret)); goto do_flash_read; @@ -340,7 +341,7 @@ static int jffs2_block_check_erase(struct jffs2_sb_info *c, struct jffs2_erasebl if (retlen < c->sector_size) { /* Don't muck about if it won't let us point to the whole erase sector */ D1(printk(KERN_DEBUG "MTD point returned len too short: 0x%zx\n", retlen)); - c->mtd->unpoint(c->mtd, ebuf, jeb->offset, retlen); + c->mtd->unpoint(c->mtd, jeb->offset, retlen); goto do_flash_read; } wordebuf = ebuf-sizeof(*wordebuf); @@ -349,7 +350,7 @@ static int jffs2_block_check_erase(struct jffs2_sb_info *c, struct jffs2_erasebl if (*++wordebuf != ~0) break; } while(--retlen); - c->mtd->unpoint(c->mtd, ebuf, jeb->offset, c->sector_size); + c->mtd->unpoint(c->mtd, jeb->offset, c->sector_size); if (retlen) { printk(KERN_WARNING "Newly-erased block contained word 0x%lx at offset 0x%08tx\n", *wordebuf, jeb->offset + c->sector_size-retlen*sizeof(*wordebuf)); diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c index 9fc4833c117c..6ca08ad887c0 100644 --- a/fs/jffs2/readinode.c +++ b/fs/jffs2/readinode.c @@ -63,10 +63,11 @@ static int check_node_data(struct jffs2_sb_info *c, struct jffs2_tmp_dnode_info /* TODO: instead, incapsulate point() stuff to jffs2_flash_read(), * adding and jffs2_flash_read_end() interface. */ if (c->mtd->point) { - err = c->mtd->point(c->mtd, ofs, len, &retlen, &buffer); + err = c->mtd->point(c->mtd, ofs, len, &retlen, + (void **)&buffer, NULL); if (!err && retlen < len) { JFFS2_WARNING("MTD point returned len too short: %zu instead of %u.\n", retlen, tn->csize); - c->mtd->unpoint(c->mtd, buffer, ofs, retlen); + c->mtd->unpoint(c->mtd, ofs, retlen); } else if (err) JFFS2_WARNING("MTD point failed: error code %d.\n", err); else @@ -100,7 +101,7 @@ static int check_node_data(struct jffs2_sb_info *c, struct jffs2_tmp_dnode_info kfree(buffer); #ifndef __ECOS else - c->mtd->unpoint(c->mtd, buffer, ofs, len); + c->mtd->unpoint(c->mtd, ofs, len); #endif if (crc != tn->data_crc) { @@ -136,7 +137,7 @@ free_out: kfree(buffer); #ifndef __ECOS else - c->mtd->unpoint(c->mtd, buffer, ofs, len); + c->mtd->unpoint(c->mtd, ofs, len); #endif return err; } diff --git a/fs/jffs2/scan.c b/fs/jffs2/scan.c index 8c1e692bef79..1d437de1e9a8 100644 --- a/fs/jffs2/scan.c +++ b/fs/jffs2/scan.c @@ -97,11 +97,12 @@ int jffs2_scan_medium(struct jffs2_sb_info *c) size_t pointlen; if (c->mtd->point) { - ret = c->mtd->point (c->mtd, 0, c->mtd->size, &pointlen, &flashbuf); + ret = c->mtd->point(c->mtd, 0, c->mtd->size, &pointlen, + (void **)&flashbuf, NULL); if (!ret && pointlen < c->mtd->size) { /* Don't muck about if it won't let us point to the whole flash */ D1(printk(KERN_DEBUG "MTD point returned len too short: 0x%zx\n", pointlen)); - c->mtd->unpoint(c->mtd, flashbuf, 0, pointlen); + c->mtd->unpoint(c->mtd, 0, pointlen); flashbuf = NULL; } if (ret) @@ -267,7 +268,7 @@ int jffs2_scan_medium(struct jffs2_sb_info *c) kfree(flashbuf); #ifndef __ECOS else - c->mtd->unpoint(c->mtd, flashbuf, 0, c->mtd->size); + c->mtd->unpoint(c->mtd, 0, c->mtd->size); #endif if (s) kfree(s); diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h index 0a13bb35f044..245f9098e171 100644 --- a/include/linux/mtd/mtd.h +++ b/include/linux/mtd/mtd.h @@ -143,10 +143,12 @@ struct mtd_info { int (*erase) (struct mtd_info *mtd, struct erase_info *instr); /* This stuff for eXecute-In-Place */ - int (*point) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf); + /* phys is optional and may be set to NULL */ + int (*point) (struct mtd_info *mtd, loff_t from, size_t len, + size_t *retlen, void **virt, resource_size_t *phys); /* We probably shouldn't allow XIP if the unpoint isn't a NULL */ - void (*unpoint) (struct mtd_info *mtd, u_char * addr, loff_t from, size_t len); + void (*unpoint) (struct mtd_info *mtd, loff_t from, size_t len); int (*read) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf); diff --git a/include/linux/mtd/pmc551.h b/include/linux/mtd/pmc551.h index a7f6d20ad407..5cc070c24d88 100644 --- a/include/linux/mtd/pmc551.h +++ b/include/linux/mtd/pmc551.h @@ -36,8 +36,9 @@ struct mypriv { * Function Prototypes */ static int pmc551_erase(struct mtd_info *, struct erase_info *); -static void pmc551_unpoint(struct mtd_info *, u_char *, loff_t, size_t); -static int pmc551_point (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf); +static void pmc551_unpoint(struct mtd_info *, loff_t, size_t); +static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len, + size_t *retlen, void **virt, resource_size_t *phys); static int pmc551_read(struct mtd_info *, loff_t, size_t, size_t *, u_char *); static int pmc551_write(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); -- cgit v1.2.3